#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main()
{
	int num;
	scanf("%d", &num);
	for (int i = 1; i <= num; i++)
	{
		for (int j = 1; j <= num; j++)
		{
			if ((i > 1) && (i <= num - 1) && (j > 1) && (j <= num - 1))
			{
				printf("  ");
			}
			else
			{
				printf("* ");
			}
		}
		printf("\n");
	}
	return 0;
}